overlay::OverlayTiming Class Reference

OverlayTiming processor for overlaying background to each bunch crossing of a bunch train. More...

#include <OverlayTiming.h>

Inheritance diagram for overlay::OverlayTiming:

Public Member Functions
virtual marlin::Processor *	newProcessor ()
virtual void	init ()
virtual const std::string &	name () const
virtual void	processRunHeader (EVENT::LCRunHeader *run)
virtual void	modifyEvent (EVENT::LCEvent *evt)
virtual void	check (EVENT::LCEvent *evt)
virtual void	end ()

Protected Types
typedef std::map< long long, EVENT::SimCalorimeterHit * >	DestMap
typedef std::map< std::string, DestMap >	CollDestMap

Protected Member Functions
float	time_of_flight (float x, float y, float z) const
void	define_time_windows (const std::string &Collection_name)
void	crop_collection (EVENT::LCCollection *collection)
void	merge_collections (EVENT::LCCollection *source_collection, EVENT::LCCollection *dest_collection, float time_offset)
long long	cellID2long (int id0, int id1) const

Protected Attributes
float	_T_diff
int	_nBunchTrain
unsigned int	_nRun
unsigned int	_nEvt
StringVec	_inputFileNames
int	_BX_phys
float	_NOverlay
unsigned int	overlay_file_list
float	_BeamCal_int
float	_ETD_int
float	_EcalBarrel_int
float	_EcalBarrelPreShower_int
float	_EcalEndcap_int
float	_EcalEndcapPreShower_int
float	_EcalEndcapRing_int
float	_EcalEndcapRingPreShower_int
float	_FTD_int
float	_HcalBarrelReg_int
float	_HcalEndCapRings_int
float	_HcalEndCaps_int
float	_LHcal_int
float	_LumiCal_int
float	_MuonBarrel_int
float	_MuonEndCap_int
float	_SET_int
float	_SIT_int
float	_VXD_int
float	_EcalPlug_int
float	_VXDB_int
float	_VXDE_int
float	_ITB_int
float	_ITE_int
float	_OTB_int
float	_OTE_int
float	_TPC_int
float	_TPCSpacePoint_int
IO::LCReader *	overlay_Eventfile_reader
float	this_start
float	this_stop
int	_ranSeed
std::string	_mcParticleCollectionName
std::string	_mcPhysicsParticleCollectionName
std::string	currentDest
bool	TPC_hits
float	_tpcVdrift_mm_ns
bool	_randomBX
bool	_Poisson
CollDestMap	collDestMap

Detailed Description

OverlayTiming processor for overlaying background to each bunch crossing of a bunch train.

A physics event is placed at a random or fixed position of the bunch train. Then background events are overlayed to each bunch crossing of the train and merged into the physics event.

For the merging, integration times can be given for each collection or subdetector, respectively. Then only hits are added to the physics event's collections, which fall into the integration time window of the specific subdetector

Author

P. Schade DESY/CERN (based on Overlay processor by F. Gaede)

Parameters

BackgroundFileNames	(StringVec) The names (with absolute or relative pathes) of the files from which the background should be read. It is the users responsibility to provide sufficient statistics for the signal sample under study.
Delta_t	[ns] (float) - default 0.5 (0.5 ns) (CliC default) – Time difference between BXs in the BXtrain
NBunchtrain	(int) - default 1 – Number of bunches in the bunch train
TPCDriftvelocity	[mm/s] (float) - default 5.0e+7 (5cm/us)
PhysicsBX	- default 1 – BX of the physics event. Is overwritten if Random number is chosen
NumberBackground	- default 1 – Number of background events to overlay to one BX. This is either fixed (if Poisson_random_NOverlay = false) of the mean value if (if Poisson_random_NOverlay = true)
Poisson_random_NOverlay	- default false – Overlay a random number of background events to each BX. If t, the number is pulled from a Poisson distribution.
RandomBx	- default false – Put the physics event at a random number of the bunch train
RandomSeed	(int) random seed - default 42

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The documentation for this class was generated from the following files:

• OverlayTiming.h
• OverlayTiming.cc